Heating and ventilating unit



Aug Q, 1932. w. SHURTLEFF 1,373,225

HEATING AND VENTILATING UNIT Filed Nov. 17, 1930 QZZ wizzaf/M w z f mean Au 9,1932

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WILFRED SHUR'I'LEFF, OF 'MOLINE, ILLINOIS, ASSIGNOR TO THE HERMAN NELSON CORPORATION, OF MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS HEATING AND VENTILATING UNIT Application filed November 17, 1930, Serial No. 496,362.

In heating and ventilating units of the type to which the present invention relates, 1t

' is desirable to so arrange the structure that it will discharge a stream of air upwardly at high velocity and in position to lmpinge against the ceiling of the room and thereafter be distributed and disseminated to all portions of the room. I

In order to provide for the effective operation of such device, it is desirable to so arrange the air inlets and passages as to minimlze unnecessary turning or deflection of the air currents in their passage through the unit in order to operate the fan or blower most efficiently in providing for the discharge of high velocity currents of air.

The unit of the present invention conforms to the above requirements and at'the same time makes provision for the admission either of indoor air for purposes of recirculation, or outdoor air to secure a proper cool ing effect when required, and also makes provision to prevent back drafts from the outdoor inlet under heavy wind pressure from finding entrance into the room through the indoor air recirculation inlet.

The invention is also designed. to simplify the structure as much as possible and to so locate the various features comprising the unit as a whole, that it wilL'subserve its intended function in the most satisfactory and eflicient manner.

Further objects and details of the inven' tion will appear from the description thereof in conjunction with the accompanying draw= ing, wherein Fig. 1 is a vertical cross-sectionalelevation through the cabinet and Fig. 2 a vertical elevation with the front wall removed to illustrate interior arrangement.

The unit as a whole comprises a cabinet having front wall 10, rear wall 11, end walls 1212, a fiat .top 13 and a base 14.

The interior of the cabinet is divided by means of a horizontal partition Wall 15 and a vertical partition wall 16 to provide a radiator chamber 17, a hot air chamber 18, a cold air chamber 19 and a fan chamber 20.

The radiator chamber occupies the space at the base of the cabinet immediately beneath the horizontal partition wall 15 and the front wall of the cabinet adjacent this space is apertured to provide an indoor air inlet 21 which extends from end to end of the radiator at a point close to the floor level.

Within the radiator chamber is located a light-weight radiator 22 of high radiating capacity, which extends from end to end of the cabinet immediately behind the recirculation air inlet. The radiator in the form here shown comprises a wedge-shaped core 23 upon which are threaded a multiplicity of closely spaced plates or fins 24. 'The core and fins arepreferably formed of metal having high thermal conductivity, and the plates or fins are closely wedged on to the core of theradiator to aflord a close metal to metal contact for the purpose of promoting thermal conductivity. j

The hot air chamber 18 occupies the space immediately behind the radiator, chamber and immediately beneath the cold air chamber 19 and between the chambers 18' and 19 is located a damper 25 which when closed spans the space between the rear wall and the rear edge of the horizontal partition wall 15 and when thus adjusted, serves toblock off. the circulation of air through the radiator. 1 J a The rear Wall 11 of the cabinet is provided in its centerwith an outdoor air inlet aperture 26, which. is surrounded by an exteriorly,

projecting flange 27 furnishing an outdoor air conduit through the rear wall of the cabinet and within this conduit is located a damper comprising, as shown, a plurality of adjustable leaves orsections 28 which,

when standing vertically, Will close the inlet, and when standing horizontally, will open the inlet to its fullest extent.

Within the fanv chamber is located a fan 29 having its inlet 30 projecting through the partition wall 16 and into the cold air chamber 19 The fan is driven by a motor 31 and the fan and motor' rest upon and arev portionof which arches over the fan so that I will be driven through the filter and ultimately delivered at high velocity through the 7 air discharge opening in the top of the cabi- 0 peration In the operation of the unit, it is the customary practice when the room temperature is objectionably low, to shut the outdoor air damper and open the hot air damper to the fullest extent and recirculate the'lndoor air until the latter has been heated to the desired temperature, at which time the supply of steam or'other heating medium to the radiator will be shut off and indoor air recirculated, without being additionally heated, the

discharge of the recirculated'air at high velocity serving to maintain the air throughout the room in a gentle motion which is conducive to the comfort of the occupants.

If the room temperature should rise above a comfortable degree, the outdoor inlet normally find its way immediatelg damper may be opened, either partially or wholly, and the hot air damper 25 closed either wholly or partially, which serves to admit fresh, outdoor air in the volume required to maintain comfortable conditions within the room. Where heavy wind pressure might tend to cause back drafts through the recirculation air inlet, it isdesirable to fully 'close the hot air damper against the admission of such back draft before the cold air damper is completely opened, so as not to permit the fan to be-over-loaded under wind pressure beyond its normal ca acity.

- However, the arrangement 0 the structure is one which guards against such abnormal operation, since the outdoor air inlet is lo cated directly opposite the mouth of the fan so that the entire volume of outdoor air will into the fan and only rarely will tend to nd egress downwardly andlthrough the recirculation air inlet. At the same time the location of the radiator, immediately adjacent the re- I immediate heating of air as soon as it is I sucked into the unit and the normal travel B0 is in a relatively direct line. without serious.

of either hot air or cold air through the device deflection and without being forced through sinuous or restricted (passageways sothat the fan may be operate let above the fan.

at moderate speed to produce an adequately high velocity of discharge to. subserve the purposes of the present invention. a

The construction and arrangement of the parts is simple in the extreme and free from complicationswhich might tend to increase the cost or decrease the efiiciency of the apparatus. Although the invention has been described with considerable particularity as to detail, it is not the intention unless otherwise indicated in the claims, to limit the invention to the specific details shown, since departures therefrom are within the scope of the invention.

I claim:

1. In a unit heating and ventilating" device,

the combination of a cabinet provided near its base with an indoor air inlet, a radiator located near the base of the'cabinet and in alignment with the indoor air inlet, the cabinet being also provided in its rear wall with an external air inlet, and a fan located above theradiator and having its intake in alignment with the external air inlet and the cabinet being provided with a discharge out- 2, In a unit heating and ventilating device, the combination of a cabinet provided near its base with an indoor air inlet, a radiator located near the base of the cabinet and in alignment with the indoor air inlet, the cabinet being also provided in itsrear wall with an external air inlet, and a fan located above I the radiator and having'its intake in alignment with the external air inlet and the cab inet being provided with \a dischargeoutlet above the fan; a damper interposed between the radiator and thefan for controlling the flow of air admitted through the indoor air' outlet, and the external air inlet-being provided with a damper for controlling the flow of air therethrough.

3. In a heating and ventilatin unit, the combination of a cabinet provi ed with a horizontally extending partition wall and a vertically extending-partition wall serving to divide the cabinet into a radiator chamber in the base of the cabinet, a-hotair chamber behind the radiator chamber, a cold air chamber above the'hot air chamber and behind the vertical. partition wall, and afan chamber in front of the vertical partition wall and above the-horizontal partition wall, the cab- I o v .rectly into the radiator chamber, being proclrculation air inlet, is such as to causean ,ber and being provided in its top with an air discharge outlet, a radiator located within the radiator chamber and immediately behind the indoor air inlet, a fan located in the fan chamber and having its mouth entered 'into the cold air chamber in immediate proximity to the external air inlet, and dampers for conand rear walls,

trolling the flow of air to the fan from the radiator chamber and from the external air inlet, respectively, and the discharge thereof from the fan chamber through the air discharge outlet; and an air filter located within horizontal partition wall connected at its rear edge with a vertical partition wall dividing the interior of the cabinet into a radiator chamber underlying the horizontal part1- tion wall, a cold air chamber between the vertical artit'on wall nd the rear wall of p 1 a hereunto subscribed my name this fourth day the cabinet a hot air chamber located below the cold air chamber and behind the radiator chamber and a fan chamber located above the horizontal partition wall and in front of the vertical partition wall, the top of the cabinet being provided with an elongated discharge openlng, the front wall of the cabinet being provided with a horizontally elongated chamber, a hot air damper interposed between the hot air chamber and the cold air chamber, and a cold air damper located in the external air inlet.

6. Ina unit heating and ventilating devlce,

the combination of a cabinet provided in its front wall near its base with an indoor airinlet, a radiator located near the base of the cabinet and'immediately behind the indoor w air inlet, the cabinet being also provided in its rear wall with an'external air inlet, and a fan located above the radiator and immediately in i with the external fan, and means for controlling the flow of air.

from the indoor air inlet and from ternal air inlet respectively. Z

In witness that I claim the foregoing I have the exof November, b

' WILFRED SHURTLEFF.

indoor air inlet opening into the radiator chamber, and the rear wall being provided at a higher elevation with an exterior air inlet opening into the cold air chamber; a horizontally elongated radiator extending from end to end of the cabinet and located within the radiator chamber, a fan located within the fan chamber and having its mouth opening into the cold air chamber in alignment with the external air inlet, a hot air damper interposed between the hot air chamber and the cold air chamber, and a cold air damper for regulating the inflow of air through the external air inlet.

5. In a heating and ventilating combination of a cabinet comprising front end walls and a top and having on its interior a horizontal partition wall and a vertical partition wall dividing the cabinet cabinet and diating capacity and an into a radiator chamber near the base of the below the horizontal partition wall, a hot air chamber in the base of the cabinet and to the rear of the radiator chamber and a cold air chamber behind the vertical unit, the

partition wall and above the hot air chamber,

the front wall of the cabinet being provided near its base with an elongated indoor air inlet opening into the radiator chamber, the rear wall being provided with an external a r inlet opening into the cold air chamber and the top of the cabinet being provided with a discharge opening; a light-weight radiator composed of metal having high raextended radiating surface and located within the radiator chamber, a fan located within the fan chamber and having its mouth entered into the cold air 

